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web/static/js/monitor.js

@@ -5819,6 +5819,13 @@ function parseToolCallArgsFromData(data) {
     return args;
 }
 
+function toolCallArgsEmpty(args) {
+    if (args == null) return true;
+    if (typeof args !== 'object') return false;
+    if (Array.isArray(args)) return args.length === 0;
+    return Object.keys(args).length === 0;
+}
+
 function formatToolCallTimelineTitle(toolName, index, total) {
     const name = toolName || (typeof window.t === 'function' ? window.t('chat.unknownTool') : '未知工具');
     const idx = index || 0;
@@ -6110,6 +6117,10 @@ function mergeToolResultIntoCallItem(item, data, options) {
 
     if (item.classList.contains('tool-call-collapsible')) {
         const state = toolCallDetailStateByItemId.get(item.id) || {};
+        const resultArgs = parseToolCallArgsFromData(data);
+        if (toolCallArgsEmpty(state.args) && !toolCallArgsEmpty(resultArgs)) {
+            state.args = resultArgs;
+        }
         state.resultData = data;
         state.rawText = text;
         state.resultDetailId = data.processDetailId || state.resultDetailId || '';
@@ -6214,6 +6225,13 @@ function coalesceProcessDetailsToolPairs(details) {
     function absorbResult(targetDetail, resultDetail) {
         const rd = resultDetail.data || {};
         targetDetail.data = targetDetail.data || {};
+        if (toolCallArgsEmpty(parseToolCallArgsFromData(targetDetail.data))) {
+            const resultArgs = parseToolCallArgsFromData(rd);
+            if (!toolCallArgsEmpty(resultArgs)) {
+                targetDetail.data.argumentsObj = resultArgs;
+                targetDetail.data.arguments = JSON.stringify(resultArgs);
+            }
+        }
         targetDetail.data._mergedResult = Object.assign({}, rd);
         if (resultDetail.id) {
             targetDetail.data._mergedResultDetailId = resultDetail.id;

web/static/js/tool-result-args-backfill.test.cjs

@@ -0,0 +1,18 @@
+const test = require('node:test');
+const assert = require('node:assert/strict');
+const fs = require('node:fs');
+
+test('tool_result 合并回工具调用卡时会回填空参数', () => {
+    const source = fs.readFileSync('web/static/js/monitor.js', 'utf8');
+    assert.match(source, /function toolCallArgsEmpty\(args\)/);
+    assert.match(source, /const resultArgs = parseToolCallArgsFromData\(data\);/);
+    assert.match(source, /toolCallArgsEmpty\(state\.args\) && !toolCallArgsEmpty\(resultArgs\)/);
+    assert.match(source, /state\.args = resultArgs;/);
+});
+
+test('历史 process_details 合并时也会从 tool_result 补齐 tool_call 参数', () => {
+    const source = fs.readFileSync('web/static/js/monitor.js', 'utf8');
+    assert.match(source, /function absorbResult\(targetDetail, resultDetail\)/);
+    assert.match(source, /targetDetail\.data\.argumentsObj = resultArgs;/);
+    assert.match(source, /targetDetail\.data\.arguments = JSON\.stringify\(resultArgs\);/);
+});